murray



(No Model.) 2 Sheets-Sheet I.

O. H. MURRAY.

HYDRAULIC MECHANISM FOR OPERATING ORDNANGE.

Patented Dec. 20, 1887.

[rm/m to? (No Model.)

2 SheetsSheet 2.

G. H. MURRAY. HYDRAULIC MECHANISM FOR OPERATING ORDNANGE.

Patented Dec. 20, 1887.

fig. 0".

UNITED STATES PATENT OFFICE.

CHARLES H. MURRAY, or ELSWIQK WORKS, NEWCASTLE-UPON-TYNE, ENG- LAND,ASSIGNOR TO W. e. ARMSTRONG, MITCHELL a 00., (LIMITED,) or

SAME PLACE.

HYDRAULIC MECHANISM FOR OPERATING ORDNANCE.

SPECIPICA TION- forming part of Letters li atent No. 314,990. datedDecember 20, 1887. Application filed May 31, 1887. Serial No. 239,857.(No model.) Patented in Italy December 8!, 1886, No. 20, 54.

To all whom it may concern:

Be it known that 1, CHARLES HENRY MUR- RAY, a subject of the Queen ofGreat Britain, residing at the Elswick Works, Newcastleupon-Tyne,England,- engineer, haveinvented certain new and useful Improved Gearfor Guns Fitted with Hydraulic Running-In-and- Out Cylinders, (for whichI have received Letters Patent in Italy, N0. 20,7 54, dated Dero cember31, 1886,) of which the following is a specification.

This invention has for its object improved gear for guns fitted wit-hhydraulic runningin-and-out cylinders.

When a gun fitted with hydraulic runningin-and-out cylinders is mountedon a front pivoted slide, it is not easy to make the movement of the gunact upon the valve used for passing the pressure-water to and from therun- '20 ning-in-and-out cylinder, owing to the varying position of thiscylinder in relation to the said valve. I therefore introduce additionalvalve apparatus on the pipe which leads liquid to and from the rear endof the running-in-andout cylinder, and I arrest the running out of thegun by throttling the passage of liquid under pressure through this pipeto the rear end of the cylinder, and similarly arrest the running in ofthe gun by throttling the exhaust of liquid through thi ipe. Themechanism by which I efiect this is shown in the' drawings annexed.

Figure l is an elevation, partly in section, of

a gun and carriage mounted on a front pivoted slide and provided with a.hydraulic runningin-and-out cylinder. Fig. 2 is a plan of the slide andcarriage with the gun removed. Fig. 3 is a section to a larger scale,showing the additional valve apparatus.

a is the gun. b is the carriage. c is the slide, turning about ahorizontal axis at its front end, which axis consists of pivots n n, bywhich the slide is connected with standards a n, which may be upon aturn-table or be supported otherwise in suitable well-known way.

d is the hydraulic .rnnning-inand-out cylinder. It is fixed upon theslide, and has working with it a piston, d, the piston-rod of which goisattached to the carriage b. When the gun is fired, the recoil iscontrolled in the ordinary manner by allowing liquid to escape from therear end of the cylinder past spring reliefvalves X into a tank, Y,which is largeenough' to contain the liquid till it has time to flowaway by a waste-pipe. At the same time a valve in the piston allowswater to pass to fill the annular space in front of the piston, as isusual.

0 is a pipe by which liquid is passed into and from the rear end of the.cylinder d towork the gun, and e is a pipe by which liquid underpressure is admitted to or allowed to pass from as shown at Fig. 2, ledto the pivot of the slide, and from thence they are connected to theordinary slide-valve, A, which is provided with the ordinaryvalve-lever, B, and used for controlling the admission of liquid underpressure either to the one pipe or the other in well-known way. The pipee is connected at m with the rear portion of the cylinder, and the pipe6 is connected at m with the front portion thereof.

When the valve is shifted into such a position that liquid underpressure is admitted to pipe e, the gun is run in; but when the valve isshifted into a position to admit water under pressure 'to the pipe 0 thegun is run out.

As it would be difficult to arrange for the gun in its movements tocontrol this valve so as at the proper time to arrest the running in orout movement, I, as before stated, introduce additional valve apparatuson the pipe 0. This additional valve apparatus is shown separately on alarger scale at Fig. 3. It is composed of a pair of throttle-valves soarranged that the water going to the cylinder tends to shut one valve,f, and lifts and passes the other, 9, while on passing back from thecylinder the water lifts and passes the first valve, f, and tends toclose the last one, g. A coiled spring, h, is applied to each of thesevalves, to hold it to its seat when required, and the two springs areconnected with a lever, i, one on either side of the fulcrum d of thelever. The lever of the double throttle-valve, when in its central ornormal position, holds these two helical springs h, one resting lightlyon each valve.

the front end of the cylinder. Both pipes are,

the pipe 6 and allowed to pass away from the bar It endwise.

In this position the water is free to pass to or from the cylinder byone or other of the valves. It will be seen there is one valve to bethrottled to check the running out of the gun and one to be throttled tocheck the running in of the gun. The throttling action is thusperformed: There is'a tappet-bar, k, carried upon the gunslide below thegun-carriage. It is provided with a tappet, k, at each end, and madefree to slide in its supports. This tappet-bar is attached freely to thelever i of the double throttle-valve; On the carriage b is aprojectioli, b, which, as the carriage completes its running in or outmovement, strikes against one or other of the tappets k and moves theThis movement of the bar turns the lever 03 in one or other direction asthe gun finishes the last part of its movement either when running in orout. When the tappet-rod, set vin motion by the carriage b, thusmoves-the lever i, it compresses one or the other of the springs 11,bringing a graduallyincreasing pressure upon the valve f or g, by whichthe water is passing, and, as the action continues, finally the water isso throttled that the carriage comes gentlyto rest.

The springs I make of different strengths. The one for the valve 9,through which the pressure-water must pass to run the gun out, is madestrong. enough to hold the valve closed against Y the highest pressureused, while the spring which acts on the water on its way from the rearend of the running-in and-out cylinder needs only to be alight one, asthe water ure.

I claim' 1. The combination of the gun-slide a, turningabout ahorizontalaxis at its front end, the

carriage running upon the slide, the runningin-and-outcylinder with itspiston, the one connected with the slide and the other with and allowingit to pass from the rear and front portions of the cylinder, and thethrottleis then only exhausting and is at a low pressthe carriage, thepipes e e, admitting liquid to the cylinder, the pipes e e, .forsupplying.

liquid to the rear and front of the cylinder, the throttle-valvesfand g,checking the flow through these pipes, the springs holding the valves totheir seats, and the lever operated by the gun in its movement andcompressing the said springs, substantially as described.

7 i C. H. MURRAY. Witnesses: I

WM.-JOHN GREY,

Notary Public. T. PURvIs.

